Mr Shaw says this year's 'mould season' has been good for business and that has flow-on effects to farmers who grow clove plants.

He says there's no commercial production of clove plants in Australia and most of the supply comes from Indonesia.

"The clove tree is native to Indonesia and needs a very warm, humid, tropical climate," he said.

"So the plants are grown there and the oil is typically produced quite close to those farms to keep transport costs down, particularly because of the volume of plant material you need to make a bottle of oil."

Mr Shaw says across the globe around 50,000 tonnes of clove oil is produced each year, and supply becomes extremely tight when large populations are flooded, such as the Brisbane floods a couple of years ago in Australia.